Superheater



Oct. 30, 1928.

J. A. BARNES surnnusnfifi Filed Nov. 11, 1925 IN VEN TOR.

OOOOOJ 000000 John A Barnes A TTORNE Y.

Patented Oct. 30, 1928.

UNITED. STATES JOHN A. BARNES, 0F CHAPPAQUA, NEW

YOBK, ASSIGNOR TO THE SUPEBHEATER COMPANY, OF NEW YORK, N. Y.

SUPERHEATER.

Application filed November This invention relates to superheaters andhas r'or its purpose the protection of the tubular elements or units ofsuch structures at times when the steam consuming devices whichordinarily are supplied with steam from the superheater are not drawingsuch steam.

The invention is illustrated in the accompanying single sheet ofdrawings. On these drawings Fig. 1 shows a Scotch marlne boiler in endview with a superheater equipped with my invention; Fig. 2 is asectional yiew on line 2-2 of Fig. 1; Fig. 3 is a partial plan view ofthe boiler.

The boiler in which my invention is shown for illustrative purposes isas stated oi the Scotch marine type. It has a cylindrical shell 1, afront sheet 2, a rear sheet 3, the usual flue 4, combustion chamber 5and flues 6-6 connecting the combustion chamber to the flue sheet 2. Thegrate (not shown) is in the flue 4 and the gases of combustion pass tothe right as seen in Fig. 2 to the combustion chamber 5 and then forward(to the left, as seen in Fig. 2) through the fines 6 and then to thestack by means of the usual breeching (not shown). lVithin the lines 6-6are located the tubular superheater elements 77. The ends of theseelements are connected to the headers 8 and 9 respectively. The header 8is supplied with live steam from the boller through the pipe 10, anddelivers this sat.

urated steam to the tubular superheater elements. After flowing throughthese ele ments and thereby becoming superheated the steam is deliveredto the header 9, from which it is carried to the point of use, such asthe engine. All of this is an ordinary and well known arrangement. Inservice in which this type of boiler and superheater are used there isusually a main engine which runs with some intermissions and one or more11, 1925. Serial No. 63,406.

location of the partition 10 will depend upon the relative amount ofsteam used by the auxiliaries and by the main engine respectively. Ifthis partition 10 were solid then upon closing down the main engine thesteam in those units opening to the left of the partition (as seen inthe drawings) would be stagnant and very rapidly be heated to hightemperature and no longer allord any protection to the superheater.Instead of being solid, however, the partition 10 has a small opening 13in it. At times when the main engine is shut down and the auxiliariesare drawing steam from the end 12 there will be a flow of steam throughthis opening 13 mingling with the steam delivered by those units openinginto header 9 to the right of partition 10. This flow which of coursemeans flow through the elements or units opening into the header 9 tothe left of partition 10 is suiiicient to protect these elements.

At times when both the main engine and the auxiliaries are at work theremay be a slight flow from one side of partition 10 to the otherdepending upon whether the two are using the normal amounts of steam ornot, but this slight flow is not at all objectionable.

Should it happen that the main engine is operating and all of theauxiliaries shut down those units opening. into header 9 to the right ofdivision 10 are protected in a similar way as in the case first outlinedabove. The flow through opening 13 will in that case be from the rightto the left and this flow which means 'a corresponding flow through theelements to the right of partition 10 will protect these elements.

What I claim is:

1. In apparatus of the class described, the combination of a superheaterinlet header; an outlet header; tubular superheater elements the twoends of each of which are secured to the two headers respectively; theoutlet header having two outlet connections; and a partition in theoutlet header between the two outlet connections and in such positionthat some of the elements deliver steam to one side of it and theremaining ones to the other; there being a duct adapted to carry steamfrom one side of the partition to the other.

2. I11 apparatus of the class described, the

combination of a superheater inlet header;

an outlet header; tubular superheater elements the two ends of each ofwhich are secured to the two headers respectively; the 10 outlet headerhaving two outlet connections; and a perforated partition in the outletheader between the two outlet connections and in such position that someof the elements deliver steam to one side of it and the 15 remainingones to the other.

JOHN A. BARNES.

